Hoisting device



I April 22, 1930. R. avcoFFMAN HoIsTING DEVICE ,Filed May 31, 1929Snoentor,

lioberZ' B. C offman,Y

. Patented Apr. 2'2, 1930 PATENT OFFICE ROBERT B. COFFMAN, F NEWALEXANDRIA, PENNSYLVANIA HOISTING DEVICE Application. Iled May 31, 1929.Serial No. 367,469.

This invention relates to hoisting devices, and especially to a hoistingattachment for tractors. l

One object of this invention is to provide I a comparatively simple andvery effective unitary hoisting device which can be quick- 1y and easilyattached to a tractor in such relation that it can be conveniently andeasily operated by a driver on the drivers seat of the tractor, andwhich is effective for raising a scoop or other object at the rear partof the tractor. L

Another object is to provide a deviceof this character which effectivelyholds the scoop or other raised body in any oneof an infinite number ofelevations Without manual aid in holdingthe same.

Another object is to provide a deviceof this character which isattachable to the tractor by means of essential parts of the tractor.

and without interfering with'the operation or effectiveness of thetractor. l

Other objects and important features are pointed out or implied inthefollowing details of description, in connection with the accompanyingdrawings in which:

Figure 1 is a view partly in elevation and partly inlongitudinalvertical section, of a Fordson tractor having a scoop attached to itshitching lug, and having my improved hoisting device attached to thetractor and to the scoop.

, Fig. 2 is a plan view of my improved hoisting device or scoopv lifter,and a part of the tractor, the latter being shownl in broken lines, andserving to show the attaching relation of the hoisting device to thetractor.

Fig. 3 is a rear end view of the hoisting device detached from thetractor. Fig. 4 is a view of the front end or cross bar attached to themiddle part of the tractor bodyy by means of two of the series ofboltswhich hold the front and rear sections of the tractor body in unitedrelation. l Y Referring to these drawingsv in detail, in which similarreference character correspond to similar parts in the several views,and in and rear ends, respectively, of the beams.

An intermediate cross beam 8- is s aced a slight' distance in front ofthe rear eam 7, and brace bars 9 are united with the rear beam 7 andextend angularly therefrom yto the respective beams 5, at points betweenthe beams 7 and 8, and are secured by rivets, bolts or other appropriatemeans.

Uprights or standards 10 are secured to the beam 7, and braces 11extend'downward'and forward from the standards 10 to the beams l 5, andare secured'by appropriate means. Bearings 12are secured on` theuprights 10,

and a rock-shaft or lever 13 is journalled in 4 these bearings. To anarm 14 of this rock shaft, a chain- 15 depends and terminates 1n aclevis 16 for attachment to any obJect to be lifted by the hoistingdevice. In Fig. l, the clevis 16 is shown attached to ther draw-beam ofthe scoop S. On the rock-shaft 13, a wormL segment 17 lis secured, andmeshes wlth a worm 18 on a handle-shaft 19 which has a crank-handle 20on its front end. The rear end of the handle-shaft is journalled in abearing 21 on the leftward standard 10. The rightward standard -10 isadjacent to, but slightly leftward of the median plane of the frame.Within such median plane, the lifting arm 14 is disposed, and also abearing 22,

this bearing .being secured on and supported by two uprights or inwardlinclined beams or beam-sections 23 which orm an apex under the bearing22 and are bracedby two beams or brace members 24. While these drawingsindicate that the frame members and uprights are secured by rivets orbolts, they may be secured by electric welding or other a propriatemeans.

The iJront beam 6 is preferably depressed ate with the shaft 19,`worm18, segment 17 at its middle part ,to receive theunder side of thetractor bo y at the flanges f of the front 4and rear sections of thetractor. As is well known, these anges are curved, and are apertured/ toreceive securing bolts b. rlwo of these bolts b, extend through theupper apertured ends of securing links 25 which have their lower endssecured to the beam 6. The links 25 are preferably pivotally secured, asindicated at 26, and the pivpts are prefer ably removable bolts, whichmay be interychanged from the position shown, into engagement with anyone of *the numberof boltholes 27 in the front beam 6, for adjustment,according to the different forms of tractors to which the device isattachable, Two of thel bolts b extend thru bolt-holes near the middle,of the beam 6, and combine with the links 25 to very securely hold thefront end of the frame in position.

About midway between the front end beam 6 and the uprights 23, the beams5 are apertured at 28 to receive U-bolts or screw-threaded yokes 29having nuts 30 on their screwthreaded ends. These U-bolts 29 straddlethe respective ends of the gear-casing of the tractor T, and thenuts,when tightened against the lower surfaces of the L-beams 5, serveto firmly unite the beams 5 with the gear casing, While the front end ofthe frame is united with the flanges f by means of the links 25, aspreviously explained.

From the foregoing description and explanation, in connection with thedrawings, it will be seen that when itis desired to raise the scoop orother object which is fastened to the chain 15, it is onlyT necessaryfor the vdriver (on the seat of the tractor) to extend his right armslightly rearward, grasp the crankhandle 20, and turn it in they properdirection, -and the crank-handle will cooperand chain 15, Jfor easilyraising the object attached to' the chain. When it is raised', and whenthe hand is released from the crankhandle 20, it will remain raised,because of the intermeshingrelation of the -worm with the worm wheel orworm segment- When it is desired to lower the scoop or other objectattached to the chain 15, the handle crank 20 is turned in the oppositedirection Vfrom that required to raise the object. If the bearingsof therock shaft 13 and of the shaft 19, and the teeth of the gear members' 17and 18 are kept properly lubricated, the operation of the device is.quick and very easy.

Although I have described this embodiment of my invention veryspecicallyit is not my intention to limit my patent protection to theseexact details oiconstruction and arrangement, for the invention issusceptible of changes within the scope of the' inventive ideas asimplied and claimed. Q

What I claim as my inventlon 1s: 1. In a-hoisting device designed foratards; vin combination with a rockshaft in said bearings and includingan arm, means on said arm for connecting it to a load to be lifted, aworm-gear member on said rockshaft, a worm meshing with said worm-gearmember and cooperative therewith to turnv said rock-shaft in oppositedirections, a handle-sha ft connected to said'worm and extend-- ingforward and being operable to rotate said worm, yokes to extend over therespective ends oi the gear-case of the tractor and provided with meansto secure them to. said side bars, and means at the front end of thevside bars to engage with the intermediate part of the tractor andcooperate with said yokes for holding the side bar s in a rearwardly andupwardly inclined position.

2. In a hoisting device designed for attachment to a tractor whichincludes a gearcasing; a frame which comprises side beams, a Jfront endbeam united with the front ends of the side beams, uprights onv saidside beams, a bearing on said uprights, a .second bearing, a pair ofhorizontally alined bearings, and means on said rear end-beam tosupplort said second bearing and pair of alined bearings; in combinationwith a rock-shaft having an arm and being journalled in saidhorizontallyv alined bearings, means on said arm to connect it to a loadto be lifted, a worm. gear member united with said rock-shaft, a wormmeshing with said worm-gear member, a handle-shaft journalled in'thefirst said and second said bearings, means to secure the intermediatelparts of said side bars to said gear-casing, and means on the frontends of said side barstohold them in substantially fixed relation tothetractor.

3. In a hoisting device designed for attachment to a tractor whichincludes .a gear-casing having tubular en'ds a frame which comprisesside beams, a front end beam united with the front ends of the sidebeams, a rear n end-beam united with the rear ends of the yside beams,uprights on the side beams at points between the middle and the rearends thereof, a bearing on said uprights, a second bearing, twohorizontally alined bearings, and means on said rear end-beam to supportsaid second bearing and horizontally alined bearings, said side y beamshaving openings at points between said uprights and said front end-beam;in combination with yokes to extend over the nsaid tubular ends of thetractors gear-casing and through said openings and provided with meansJto secure them in the openingsfwhile the said front end-beams extendunder the body of the tractor, a rockshaft journalled insaid alinedbearings and comprlsing side beams, a front end-beam having its endsunited withl the front ends of said side beams, a rear end-beam havingits ends united with the rear ends of the side beams, uprights on theside beams at points between the middle'and the rear ends of the rlatter, and a bearing on said uprights; in

yto said tractor, a gearin combination with yokes to straddle saidtubular ends of the gear-casing and provided with means to secure themto the side beams' and hold thelatter up against the under side ofsaid'tubular ends, the front end-beam being providedwith means toreceive at least one of the said joining screws for holding the frontend of the frame ina deliniterelation mechanism provided with meansattacha le to a load to be lifted, means on said rear end-beam to suport said gearmgmechanism, and manual y operable means journalled insaid bearing and operatively connected tosaid gearingmechanism for"operating the latter. v5. In a hoisting device, a frame including sidebeams having their middle-parts and .rear end-beam having -front endsprovided with meansto attach them toa `tractor in such relation thattheir rear ends extend rearwardly fromv the tractor, a

the rear ends o/f sai side beams, a standard on said rear end-.beam at apoint between the middle and an end of the latter, .'nd a c saidmanually rotata horizontal bearing on said standard; in combination witha rock-shaft journalled in said bearing and having an armextendingrearward 'from a point over the middle part of said end beam, -means onsaid arm for connecting it to a load to be'lifted; an u right supportedby at least one of said side ams at a point between its middle part andsaid its ends united with bearing, and means on said rear'end beam tosupport said second bearing; in combination with a lifting membermounted for rotary movement in said second bearing, means secured tosaidv lifting member and connectable to a load for lifting the latter,and a I manually operable member journalled in the first said bearingand operatively connected to said lifting member for" effecting rotarymovements thereof.

7. In a hoisting device, a frame including side beams having their frontends provided with means to connect them and to extend under the body ofa tractor, their middle parts being provided with means to extend overthe tractors gear-casing and hold the frame in such relation that itsrear end extends upward and rearwardfrom the rear end of the tractor, arear end-beam having its ends united with the rear ends of said sidebeams, an upright supported by at least one 4of said ,side beams andhaving a bearing thereon, a

second bearing, and means on said rear endbeam for supporting the saidsecond bearing; in combinationA with a lifting member journalled in saidsecond bearing, means depending from said lifting member for connectingit with a load tobe lifted, a manually operable member journalled in thefirst said Vbearing, and means operatively connectingsaid 9 manuallyoperable member to said lifting member for effecting rotary movements of'the latter. i

, In testimony whereof I ailix my signature; ROBERT B. COFFMAN.

standard, a'bearing on said upri ht, a manu- -ally rotatable memberjourna ed in .said

bearing, and 'means o eratively connecting le member to said rock-shaftfor combining therewith to raise and lower said arm. p

, 6. In a' hoisting device, a frame including side beams Ahaving theirfront and middle parts provided with means to attach them to Y atractorlin such position that theirear ends extend. rearward from thetractor, a rear end-beam having its ends united with the rear endsvofthe side beams, a'n' upright on the part that extends rearward fromthe tractor but ata distance from said reariendbeam, a bearing on `saidupright, al second

